Rear bumper chips

Wasnt sure where to post this one. I had my bumper and reflector repaired just over a year ago due to reversing into a small gate. Not long after I noticed a few lines appear by the wheel arch. I didn't think much about it at the time but just washed the car and there are hundreds of tiny some chips on the same area the lines appeared. The photo below is of my clean car but you wouldn't think it was! The other side that was not repaired is fine. Could it be the lacquer never cured properly? Not sure what to do apart from leave it now. It's been a long time to complain now I suppose.